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Open Zone

A place where you can drive without restriction

Line of Sight

Distance you can see ahead in the direction you are looking

Path Of Travel

Space your vehicle will occupy as you travel ahead

Target Area

Section of roadway where the target is located and the area to the left and right of the target

Closed Zone

Space not open to you because of a restriction in your line of sight or intended path of travel

Target area range

Space from your vehicle out to target area

12-15 second range

Area you will be traveling in during the next 12-15 seconds, and where you need to identify changes in your path of travel

4-6 second range

Area where you will be traveling during the next 4-6 seconds, and where you get the final update of how you are controlling your intended path of travel

Orderly visual search pattern

Process of searching critical areas in a regular sequence

Field of vision

All the area a person can see while looking straight ahead

Central vision

Cone-Shaped area of up to 10 degrees in your field of vision in which you can see clearly while looking straight ahead

Peripheral vision

area a person can see to the left and right of central vision

"Aim High" in Steering

look ahead 12-15 seconds of where your driving

Ground Viewing

Making quick glances to the roadway in front of your vehicle


Friction or gripping power between the tires and the roadway surface

Space cushion

Open area around a vehicle consisting of adequate following distance between it and the vehicles ahead and behind, plus swerve paths to left and right

Minimize a hazard

Reduce the possibility of conflict by putting more space between your vehicle and the hazard

compromise space

Reduce risk by giving as much space as possible to the greater of two or more hazards

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